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EUROCRYPT
1999
Springer

On the Concurrent Composition of Zero-Knowledge Proofs

9 years 6 months ago
On the Concurrent Composition of Zero-Knowledge Proofs
We examine the concurrent composition of zero-knowledge proofs. By concurrent composition, we indicate a single prover that is involved in multiple, simultaneous zero-knowledge proofs with one or multiple verifiers. Under this type of composition it is believed that standard zero-knowledge protocols are no longer zero-knowledge. We show that, modulo certain complexity assumptions, any statement in NP has k -round proofs and arguments in which one can efficiently simulate any kO(1) concurrent executions of the protocol. Key Words: Asynchronous Attacks, Zero Knowledge, Black-box Simulation.
Ransom Richardson, Joe Kilian
Added 04 Aug 2010
Updated 04 Aug 2010
Type Conference
Year 1999
Where EUROCRYPT
Authors Ransom Richardson, Joe Kilian
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